Rock-drill.



G. A. BRAY.

APPARATUS AND METHOD FOR MINING, APPLIOATIOI FILED JUNE 16,1908.

Patented July 13, 1909.

SHEETS SHEET3.

Inventor,

6' Attorney.

aw W s. W. BROTHERS.

ROCK DRILL. I APPLICATION FILED APR. 9, 1907.

Patented July 13, 1909.

5 SHEETS-BHEET 2.

61 Momma Q vih wooeo S. W. BROTHERS.

ROCK DRILL. APPLICATION FILED APR. 9, 1907.

Patented July 13, 1909.

BSHBETB-BEBBT a.

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APPLICATION FILED APR. 9, 1907. 1 927,940, Patented July 13, 1909.

5 sums-sum 4.

' Patented July 13,1909.

- 5 SHEETS-SHEET 5.

S. W. BROTHERS.

ROCK DRILL.

APPLICATION FILED APR. 9 1907. 927,940.

\\\\\ mml witmaooo T UNIT D STATES,

PATENT OFFICE.

SANFORD w. eRoTHEns, or DENVER, GOLORADO.

' ROCK-DRILL.

Specification of Letters Patent. Application filed April 9, 1907. Serial No. 367,268.

Patented July 13, 1909.

To. all whom it. may. concern:

-, Be it known that I, SANFORD W. BROTH- nns, a citizen of the United States, residingat the city and county of Denver and State 5 of Golorado, have invented certain new and marked thereon, which form a part of this specification.

My invention relates to improvements in rock drilling machines and relates tocertain novel: features of construction, all of. which will: be fully understood by reference to the accompanyin drawing in which is illustrated. an em odiment thereof.

- In this drawing, Figure l is a vertical I longitudinal. section taken through my imenlarged-2 sectional view of the mechanism, however,

proved machine. Fig. 2 is a top plan view of. the .same with the drill steel removed. Fig. 3: is a section similar to Fig. 1. The is partlybroken away ger scale. Fig. 4 is an rear portion shows the part and shown on a lar of the drill. This view broken away in Fig. 3; section taken on; the line 5-5 Fig. 1. Fig. 6 is asectional view showing: the forward extremity of; the drill casing. Fig. 7. shows the pipe passed centrally through the drill for. introducing water to the drill hole. Fig. 8-is a sectional view of the body of the drill showing: the bodyio'fthe casing and the operating parts thereby. Figs. 9, 10. and 11 are cross sections taken on the lines 9.- 9,. 10- 10 and 11-11, respectively of Fig.- 1. T The same reference characters indicate the same partsin all the views. -1 Let the numeral 5 designate the body of the drill! casing and. 6' the forward member be the. casing-,thetwo casing parts being connected 'rods 7 passed through. lugs 8v and Qon-thebOdy of; the casing andilugs 10 on the memberAG. These'rods are threaded into the lugs 9 while nuts are applied to their opposite extremities and seate lugs:8 and 10 thus securely fastening the casing members in the assembled relation. In the forward memberof the casing, is inserted from the rearfabushing-12 hav ng}- ;ing collar 14:. The

Fig. 5 is across against the;

rubber-buffer 30and inthe rear of the latshoulder 12 engaging an offset formedon the casing member. Into the rear extremity of' this bushing 12 is screwed a sleeve 13 whose rear extremity is engaged by a packgrooved to receive tongues 15 formed on the forward. reduced part 16 of the hammer 17.

Inserted in the forward extremity of the casing member 6 is a chuck 18 whose rear extremity is exteriorly threaded to engage:

interior threads formed on the forward ex tremity of the bushing this construction the chuck is connected with the said bushing and is made to rotate with the hammer. The forward extremity of the bushing 12 engages a shoulder 19 formed on the chuck. The chuck is retained in the forslceve 13 is intcriorly.

12. By virtue of ward extremity of the member'6 by a nut 20 screwed into-interior threads formed on j the said member, the said nut having a shoulder 21 which engages the same. The

inner extremity of the nut 20 is located in 1 frontof a shoulder 22 formed on the chuck. In the rear of the chuck is located a cap 23 having a forward recess 24 adapted to receive the rear extremity of the drillsteel 25. This drill steel is angular in cross section and the opening in the chuck together with the recess .24 of the cap are made" of counterpart shape whereby the rotation of the chuck also rotates the drill steel. Between the chuck and the cap-23, is a space 26, to allow the necessary range of movement for the drill steel during the operation of the machine. The forward extremity 27 of the body of the drill casing, overlaps the rear part 28 of the casing member 6. Hence when the connecting rods 7 are applied the two members are locked securely together. Within the forward portion of the part 27 is located a steel washer 29 whichengages the rear extremity of the casing member 6, together with the corresponding extremity of thebushing 12. .This steel washer also bears against the collar 14 and its openin ismade sufiicicntly large to allow the ham -mer member 16 to passloosely therethrough, 'the opening in the washer being plain. The forward part-- ofthe collar 14 1s also sur rounded by the steelwasher 29; while in the rear of the last named washer is located a ter, a steel. washer 31. This mechanism af I .fords'a buifer. auda ted to engage a forward tion fits closely within the cylindrical chamber 33 of the casing body. The hammer is also provided with packing rings 34 inorder to make a fluid tight joint. The rear portion of the hammer is bored from the rear to form a central opening 35, to allow the rille bar 36 to enter the same and impart the rotary movement to the hammer during the reciprocation of the latter.

In the rear extremity of a counter bore formed in the hammer is also threaded a bushing 37, the latter being provided with spiral tongues adapted to engage the counterpart grooves of thenrifle bar 36. The forward portion of this rifle bar enters the hammer when the latter is at its forward limit of movement, while its rear portion passes through the rear portion of the easing chamber and issufported by a steel washer 38 in the rear 0 which is located a rubber buffer 39, the latter being surrounded by a buffer spring 40, in the rear of which is another steel washer 60. Formed integral with the rear extremity of the rifle bar is a pawl holder 41 which is surrounded by a ratchet ring 42 threaded into the forward extremity 43 of the rear casing cap 44 which is provided with a shoulder 45 abutting a amst the rear extremit of the casing. T is cap retains the rifle ar and its pawl holder in operative relation within the easing. In the'rear extremity of the .ca 44 is formed a threaded o ening '46 into w ich is threaded the :rear cy indrical head 47 of a fluid delivery. pipe or tube 48, the said head bemg exterrorly threaded to engage the threads of the cap whereb the said'tube is secured in place.

This ead is provided wlth'a central bore registering with the passa e of the tube. The pawl holder 41, the ri e bar 36, the hammer 16 and the drill steel cap 23, are provided with central registering openings adapted to receive the water delivery tube. The. forward extremity of this tube terminates immediatel in the rear of the drill steel 25, the latter being provided with a .central passage, to 'allow the fluid escaping from theforward extremit I of the tube, to as throu h the 'drillstee to the bottom 0 the drill ole.

The reciprocating mbvement-ma'y be imparted to the hammer in any suitable manner. As shown in the drawing the machine is equipped with valve mechanism-49 for delivermg motive fluid alternately to the casing chamber in the front and rear of the enlarged or body-portion of the hammer, the said fluid entering the'chamber by way of ducts 50 and 51. I:Iowever, as nothing. is claimed on this pan. of the mechanism in this in detail, but it will be taken for granted that the mechanism is equipped with suitable means for reciprocating the hammer by a motive fluid agent. Assuming then that the hammer is reciprocated, it will be understood, that as it moves in one direction, uiainely toward the rear, a partial rotar movement will be imparted thereto throug the instruinentality of the rifle bar, the. pawl holder 41 and the ratchet ring 42, since the element 41 carriespawls 52 held inoperative relation with the teeth of the ratchet ring 42' by spring pressedpins 53 seated in recesses formed in the part 41. This rotary movement of the hammer will also impart a corresponding movement to the bushing 12, the chuck 18 'and the drill steel by virtue of the construction heretofore described.

. The drill casing is slidably mounted on the guide shell 54 and is moved back and forth hand crank 56 in the usual manner.

Attention is called to the importance of the ca 23. This cap is not only provided with t-e recess for holding the drill steel 25 but'also receives'the stroke from the hammer'and preserves the. drill. Another, and very important function that this cap peror forward portion of the fluid delivery tube 48. .It acts as a guide and support to keep the tube 48 in proper alinement during the reciprocation of the hammer. The tube 48 is also sup orted by the cap 23 whether immaterial whether the rill steel 25 is inserted. In all other drills so far as I am aware, during the return stroke of a hammer, a third if not half of the fluid tube-is unsupported, andit has been impossible to keep the tube in pro er alinement andprevent breakage thereofl as is very freguent This cap 23 overcomes all of these di cultles, and the fluid tube very seldom has to be replaced.

preserves and carries the'drill'steel 25.

. Having thus described my invention, what Iclaim1s:

1. 'In a rock drill, the combination with a casing of a drill steel, a reciprocatin hammer 1n alinementtherewith, a riflear in said bar and said hammer, havingi centrally arranged, longitudinally dispose registering-passages, a fluid dehvery tube extendin through said passages, a head-cap forsai easing, said tube havin a terminally enlarged portion remova 1y engaging said therewith, said drill steel being rovided 'ment wlthsaid tube and the aperture of said cap.

application the same will not be described forms is the supporting means for the freeoperative relation with said hammer the.

head-cap, the, other terminal of said tube havmg an apertured cap in direct contact thereon by a feed screw 55 provided with a or not the dr1l is being 0 erated. It is also Besides taking care of the tube 48 it also.

with a longitudinal bore which is in alineice 2. In a rock drill, the combination with a casing, of a drill steel, a reciprocating hammer in alinement therewith, a riflebar in operative relation with said ham- ,szmer, the said bar and said hammer havin eentrall arranged, longitudinally dispose registering passages, a fluid delivery tube extending through said passages, said hammer having perlpheral tongues, a bushing 10 disposed in the casing and having grooves bushing at one terminal and to said threaded side of the chuck at the other terminal, a nut having a collar on its outer end and secured to the casing intermediate the latter and the other terminal of the chuck, said tube having 20 an apertured cap in direct contact therewith, and said drill steel being provided with a longitudinal bore which is in alinement with said tube and aperture of said cap.

In testimon whereof I afiix my signature 25 in presence 0 two witnesses. a

SANFORD W. BROTHERS. Witnesses:

A. J. OBRIEN, Dmqa Nansen. 

